On the Experimental Results of Hiss-Triggered Chorus Observed Onboard GEOS-1 Satellite in the Outer Magnetosphere

  • K. Hattori
  • M. Hayakawa
  • D. Lagoutte
  • F. Lefeuvre
  • M. Parrot


The co-existence of hiss and chorus is frequently observed onboard satellites in the outer magnetosphere. The purpose of this paper is to investigate experimentally the association between hiss and chorus and to clarify the role of hiss in chorus generation. The paper is based on the detailed spectral analyses and direction finding measurements for the simultaneous occurrence of hiss and chorus observed onboard GEOS-1 satellite in the outer magnetosphere. The event analyzed here is observed near the equator (geomagnetic latitude, 6.8–8.5 degrees). Then, we propose the mechanism of hiss-triggered chorus based on our experimental findings.


Outer Magnetosphere Chorus Element Chorus Emission Frequency Drift Rate Chorus Generation 
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  1. 1.
    Helliwell RA (1965) Whistlers and Related Ionospheric Phenomena, Stanford Univ. Press, Stanford, CAGoogle Scholar
  2. 2.
    Dowden RL (1971) Distinctions between mid-latitude VLF hiss and discrete emissions, Planet.Space Sci. 19: 374–376CrossRefGoogle Scholar
  3. 3.
    Hayakawa M. Yamanaka Y. Parrot M. Lefeuvre F (1984) The wave normals of magnetospheric chorus emissions observed onboard GEOS-2, J.Geophys.Res. 89: 2811–2821CrossRefGoogle Scholar
  4. 4.
    Hayakawa M. Ohmi N. Parrot M. Lefeuvre F (1986) Direction finding of ELF hiss in a detached plasma region of the magnetosphere, J.Geophys.Res. 91: 135–141CrossRefGoogle Scholar
  5. 5.
    Hayakawa M. Tanaka Y. Sazhin SS. Okada T. Kurita K (1986) Characteristics of dawnside mid-latitude VLF emissions associated with substorms as deduced from the two-stationed direction finding measurement, Planet.Space Sci. 34: 225–243CrossRefGoogle Scholar
  6. 6.
    Hayakawa M. Tanaka Y. Shimakura S. Iizuka A (1986) Statistical characteristics of mid-latitude VLF emissions (unstructured and structured): The local time dependence and the association with geomagnetic disturbances, Planet.Space Sci. 34: 1361–1372CrossRefGoogle Scholar
  7. 7.
    Tsurutani BT. Smith EJ (1974) Postmidnight chorus: A substorm phenomenon, J.Geophys.Res. 79: 118–127CrossRefGoogle Scholar
  8. 8.
    Burtis WJ. Helliwell RA (1969) Banded chorus-A new type VLF radiation observed in the magnet osphere by 0G0 1 and 0G0 3, J.Geophys.Res. 74: 3202–3010CrossRefGoogle Scholar
  9. 9.
    Hayakawa M. Muto H. Shimakura S. Hattori K. Parrot M. Lefeuvre F (1989) The wave normals of chorus emissions in the outer magneto- sphere, Proc.Natl Inst.Polar Res. 2: 62–73Google Scholar
  10. 10.
    Burtis WJ. Helliwell RA (1976) Magnetospheric chorus: Occurrence patterns and normalized frequency, Planet.Space Sci. 24: 1007–1024CrossRefGoogle Scholar
  11. 11.
    Cornilleau-Wehrlin N. Gendrin R. Lefeuvre F. Parrot M. Grard R. Jones D. Bahnsen A. Ungstrup E. Gibbons WG (1978) VLF waves observed onboard GEOS-1, Space Sci.Rev. 22: 371–382Google Scholar
  12. 12.
    Koons HC (1981) The role of hiss in magnetospher ic chorus emissions, J.Geophys.Res. 86: 6745–6754CrossRefGoogle Scholar
  13. 13.
    Luette JP. Park CG. Helliwell RA (1977) Longitudinal variations of very low frequency chorus activity in the magnetosphere: Evidence of excitation by electrical power transmission lines, Geophys.Res.Lett. 4: 275–278CrossRefGoogle Scholar
  14. 14.
    Luette JP. Park CG. Helliwell RA (1979) The control of the magneto- sphere by power line radiation, J.Geophys.Res. 84: 2567–2660CrossRefGoogle Scholar
  15. 15.
    Tsurutani BT. Smith EJ. Church JR. Thorne RM. Holzer RE (1979) Does ELF chorus show evidence of power line stimulation?, in “Wave Instabilities in Space Plasma”, Edited by P.J.Palmades so and K.Papadoulos, Reidel, Holland.Google Scholar
  16. 16.
    S-300 experimenters (1979) Measurements of electric and magnetic wave fields and of cold plasma parameters onboard GEOS-1, Preliminary results, Planet.Space Sci. 27: 317–339CrossRefGoogle Scholar
  17. 17.
    Lefeuvre F. Parrot M (1979) The use of coherence function for the automatic recognition of chorus and hiss observed by GEOS, J.Atmos.Terr.Phys. 41: 143–152CrossRefGoogle Scholar
  18. 18.
    Muto H. Hayakawa M. Parrot M. Lefeuvre F (1987) Direction finding of half-gyrofrequency VLF emissions in the off-equatorial region of the magnetosphere and their generation and propagation, J.Geophys.Res. 92: 7538–7550CrossRefGoogle Scholar
  19. 19.
    Welch PD (1967) The use of fast Fourier transform for the estimation of power spectra: A method based on time averaging over short,modified periodograms, IEEE Trans. Audio and Electroacoust. 15: 70–74CrossRefMathSciNetGoogle Scholar
  20. 20.
    Lefeuvre F. Parrot M. Delannoy C (1981) Wave distribution function estimation of VLF electromagnetic waves, J.Geophys.Res. 86: 2539–2375Google Scholar
  21. 21.
    TsujiS. Hayakawa M Shimakura S. Hattori K (1989) On the statistical properties of magnetospheric VLF/ELF hiss, Proc.Natl Inst.Polar Res. Tokyo, 2: 74–83Google Scholar
  22. 22.
    Means JD (1972) Use of the three dimensional covariance matrix in analyzing the polarization properties of plane waves, J.Geophys.Res. 77: 5551–5559CrossRefGoogle Scholar
  23. 23.
    Lagoutte D. Lefeuvre F (1985) Multispectral analysis for electromagnetic wave field component in a magnetoplasma: Application to narrow-band VLF emission, J.Geophys.Res. 90: 4117–4127CrossRefGoogle Scholar
  24. 24.
    Helliwell RA. Carpenter DL. Inan US. Katsufrakis JP (1986) Generation of band-limited VLF noise using the Siple transmitter: A model for magnetospheric hiss, J.Geophys.Res. 91: 4381–4392CrossRefGoogle Scholar
  25. 25.
    Matsumoto H. Omura Y (1981) Cluster and channel effect phase bunch- ings by whistler waves in the nonuniform geomagnetic field, J.Geophys.Res. 86: 779–791CrossRefGoogle Scholar
  26. 26.
    Dowden RL. McKay AD. Amon LES. Koons HC. Dazey MH (1978) Linear and nonlinear amplification in the magnetosphere during a 6.6kHz transmission, J.Geophys.Res. 83: 169–18CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Tokyo 1991

Authors and Affiliations

  • K. Hattori
    • 1
  • M. Hayakawa
    • 1
  • D. Lagoutte
    • 2
  • F. Lefeuvre
    • 2
  • M. Parrot
    • 2
  1. 1.Research Institute of AtmosphericsNagoya UniversityAichiJapan
  2. 2.Laboratoire de Physique et Chimie de l’EnvironnementCNRSOrleansFrance

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